PROCEEDINGS OF SOCIETIES. 



Dublin Microscopical Club. 

 ISth January, 1877. 



Volutella ciliata, Fries, and V. setosa, Berk., growing together, ex 

 liibited. — Mr. Pirn exhibited Volutella ciliata, Fries, and V. setosa 

 Berk., growing together on a decaying Gladiolus bulb. The latter 

 appears to be common on various decaying substances, such as 

 orchid-bulbs ; and whilst V. ciliata is rare, the specimens shown 

 being the only ones Mr. Pim bad seen, he remarked that he had 

 found, some years ago, another form, possibly distinct, which had 

 the mass of spores yellow, with hyaline bristles, whilst the mass 

 of spores is white in V. setosa, and yellow with the bristles black 

 in V. melaloma. It grew on decayed leaves of a species of 

 Phocus. 



Heliopelta perforata, O'M., n. s., exhibited. — Rev. Eugene 

 O'Meara exhibited a form of what might, on superficial inspection, 

 be considered identical with Heliopelta Metii, Ehreub., but, on a 

 closer examination, it presented some remarkable 'points of dis- 

 agreement. The triangular compartments, which constitute so 

 conspicuous a feature of the form specified, are scarcely discernible 

 in the present case. The central boss in the form exhibited is 

 round, just as appears in Coscinodiscus perforatus ; the areolesare 

 roundish, radiate, smaller towards the centre and margin than in 

 the intermediate portion of the valve. On the ground of these 

 characters the form appears to be a distinct species, which he 

 would name Heliopelta perforata, a name suggested by the re- 

 semblance of the central boss to that of Coscinodiscus perforatus. 



Abies Williamsonii (Newberry), R. Brown, in 'Herb.^ {A. Han- 

 huryana, B. C), not the form cultivated under that name and sec- 

 tions of the leaves, exhibited. — Professor McNab showed sections 

 of the leaf of a pine from the herbarium of the Royal Botanic 

 Garden, Edinburgh, with the label, ''Abies Williamsonii, Newberry 

 {Abies Hanburyana), B. C. Assoc, M.S. Puntledge Lake Moun- 

 tains (in Vancouver's Island), V.I., Aug., 1861, Robert Brown." 

 The specimen is unique, and the label is in the handwriting of 

 Dr. Robert Brown. 



An examination of the specimen showed that the forms cul- 

 tivated in the Royal Botanic Garden, Edinburgh, under the 

 names o^ Abies Williamsonii and Abies Ilamburyana, have nothing 

 to do with the species now under examination. The new form 



